test/fuzzing/hb-shape-fuzzer.cc

#include "hb-fuzzer.hh"

#include <hb-ot.h>
#include <string.h>

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
  hb_blob_t *blob = hb_blob_create ((const char *)data, size,
				    HB_MEMORY_MODE_READONLY, NULL, NULL);
  hb_face_t *face = hb_face_create (blob, 0);
  hb_font_t *font = hb_font_create (face);
  hb_ot_font_set_funcs (font);
  hb_font_set_scale (font, 12, 12);

  {
    const char text[] = "ABCDEXYZ123@_%&)*$!";
    hb_buffer_t *buffer = hb_buffer_create ();
    hb_buffer_add_utf8 (buffer, text, -1, 0, -1);
    hb_buffer_guess_segment_properties (buffer);
    hb_shape (font, buffer, NULL, 0);
    hb_buffer_destroy (buffer);
  }

  uint32_t text32[16];
  if (size > sizeof (text32)) {
    memcpy(text32, data + size - sizeof (text32), sizeof (text32));
    hb_buffer_t *buffer = hb_buffer_create ();
    hb_buffer_add_utf32 (buffer, text32, sizeof (text32) / sizeof (text32[0]), 0, -1);
    hb_buffer_guess_segment_properties (buffer);
    hb_shape (font, buffer, NULL, 0);

    unsigned int len = hb_buffer_get_length (buffer);
    hb_glyph_info_t *infos = hb_buffer_get_glyph_infos (buffer, NULL);
    //hb_glyph_position_t *positions = hb_buffer_get_glyph_positions (buffer, NULL);
    for (unsigned int i = 0; i < len; i++)
    {
      hb_glyph_info_t info = infos[i];
      //hb_glyph_position_t pos = positions[i];

      hb_glyph_extents_t extents;
      hb_font_get_glyph_extents (font, info.codepoint, &extents);
    }

    hb_buffer_destroy (buffer);
  }


  hb_font_destroy (font);
  hb_face_destroy (face);
  hb_blob_destroy (blob);
  return 0;
}